Expanding device for grinding tool



Jan. 5, 1932.

T. F. QUlGlfEY' EXPANDING DEVICE FOR GRINDING TOOLS Filled Aug.

17, 1928 5 SheetsfSheec.

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` INVENTOR. Y.' f.' @u zlgZej.

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Jan- 5, 1932. T. F. QUIGLEY 1,839,261

EXPANDING DEVICE FOR GRINDING TOOLS Filed Aug. 17, 1928 3 Sheets-'Sheet 2 INVENTOR.

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/l TTORNEYS.

Jan. 5, 1 932. T. F.'Qu|G| EY 1,839,261

EXPANDING DEVICE FOR GRINDING' TOOLS Filed Aug. 17, 192s -s sheets-sheet s .INI/ENTOR.

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v Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE THOMAS-F. QUIGLEY., F CLEVELAND, OHIO, ASSIGNOR T0 MICROMATIC BONE CORPORATION, A CORPORATION OF MICHIGAN EXIAN DING DEVICE FOR GRINDING TOOL Application led August 17, 1928. Serial No. 300,275.

The proper operation of the type of grinding tools known as hones, which are designed for cylinder grinding and which include abrading members that operate on the cylindrical Walls of the work to be done to perform finishing operations thereon, includes as an essential feature thereof, the expanding and contracting of these abrading members. -In view of the conditions surrounding theoperation of these honing tools which creates the necessity of expanding and contracting the abrading members while they are located in the bore of 'the cylinder to be finished, the instrumentalities which function to cause the expanding ,and contracting action must be operated at a place removed from the abrading members. Moreover, proper functioning ofthe tool dictates that rotary as well as reciprocatory motion be imparted thereto from a suitable driving source. Bearing the above noted conditions ,in mind, this invention is directed to a novel device for transmitting power to instrumentalities which operate to cause expanding and contracting actions of the abrading members.

In my copending application, Serial No. 278,883, filed May 18th, 1928, I have disclosed a device including instrumentalities operable to impart expanding and contracting act-ions to the abrading members, and it is with these instrumentalities that the driving or power transmitting devices provided.`

by this invention are primarily designed to cooperate, although it is well Within the provr ince of the invention to avail of the novel construction with any type of grinding tool or hone, the same bemg adapted. for associa-' tion With any of the known tools of this character. I i

It is an object of the invention to provide p a power transmitting device of this character which may be manually operated to cause the desired action on the part ofthe expanding instrumentalities. In carrying out this idea, I avail of a planetary gear arrangement preferably internally disposed and driven from an external ring gear, having.

teeth upon at least the interna feriphery thereof and which ring gear is located in an 5 externally accessible position and suitably constructed so that it may be rotated or turned by any appropriate tool such as a Spanner wrench, suitable intermediate and internal means being provided to transmit motion through the planetary vgearing and thence'differentially to shafts for operating the `expanding instrumentalities.

In the copending appplication above identiied, the expanding instrumentalities ma be said to presuppose or to comprise a di ferential gear arrangement including a member which must be rotated in order to cause expanding or contracting action on the part of the abrading devices. This member is provided with a circular gear which is located in the middle of the ring gear hereinbefore mentioned. Intermediate this internal ring gear and the gear on the expanding instrumentalities, is positioned a pinion suitably mounted in mesh with both the said gears and which functions'to transmit the motion from the rin gear to the inner gear member. Particu ar features and objectsl of the invention are associated with the mounting and arrangement of theseigear parts-as associated with the remainder of the construction. v

As will be readily appreciated by those versed in the art,grinding tools of this character are designed to finish cylinder bores which must be very accurately dimensioned and which must be finished within thousandths of an inch. It is therefore, of essential importance that the expanding action upon the abrading members be very accurately and positively controlled. The extent to which these members will be expanded is dependent on the amount of movement differentially imparted to the respective instrumentalities causing said expansion. In view v of the foregoing, it is a highly important object of the invention to provide means which are to be associated with the power transmitting devices which control the extent to which the abrading members may be expanded and which positively prevent any expanding action past this limit.

Having recognized the fact that these tools are designed to operate on worlg of varying sizes, it is a further object toprovide concally trolling means as set forth in the preceding paragraph, which may be operated to varylimit 'of expansion. I therefore propose to avail myself of limiting means of the character above described, which may be set at the final, limiting position and which include means forholding it in this position.

In a practical embodiment of the invention, it is requisite that the limiting or controlling means have associated therewith suitable indicia for indicating the extent of expansion of the abrading members, and in accordance withthis condition, Ihave provided suitable indicia that meet the requirements.

I A more detailed featureof the invention resides in the provision of mechanism associated with the ring gear which permits of its movement completely up against the limiting means without the neclslty of applying undue force thereon.`

a ball racetogether with a bearing member are provided which obviate the element of friction which would ordinarily f arise in moving the external ring up against the limiting or controlling member.

Various other more detailed objects and advantages such as those arising 1n connection with. the association of the limiting means with the remainder of the mechanism,

will in part become apparent and in part be hereinafter stated as the-description of the invention proceeds. Fora full and more complete understanding thereof, reference .may be had to the followin description and-4 accompanying drawings, w erein- Figure 1- is a longitudinal-section through that portion of the driving mechanism to which the grinding tool or head is attached.

Figure 2 is a view in side elevation of'the mechanism shown in Figure 1.

Figure 3 is a view somewhat diagrammatic, certain parts broken away bringing out the relationship of the inner ear to the -dif-` ferential gear expanding nstrumentalities.

Figure 4 is a transverse section taken about on the line 4-4 of Figure 1. Y

Figure 5 is an end view' taken as indicated vby the line 5 5 of Figure -1.

Figurel 6 is a view partly in section and partly in elevation, somewhat'fragmentary, of the differential gear mechanism included in the expanding instrumentalities.

ore specifi-` Figure 7 is a detailed showing in perspective of the planetary gearing constituting the power transmitting device.

Figure 8 is a detail showing in section of the limiting or. stop member.

Figure 9 is a detailed fragmentary showing described, because various modifications of these details may be provided in putting the invention into practice within thel purview of the appended claims. Throughout the following description and various figures of the drawings, like reference characters denote corresponding parts. A hone or grinding tool (not shown) -is adapted to be fastened to a hollow cylindrical end portion of a main body or carrier member A in any appropriate manner, preferably detachably, as by the bayonet slot arrangement indicated at 1. Reciprocatory and rotating motions are transmitted to the tool by this hollow cylindrical portion of memberf` A through this' connection. The

.member A terminates at its other end in a 6, a housing or. bearing member 7 bevelled j gears 8'complementary ,to the gears 4 Aand .-6

and which constitute with these gears,` a dierential gear construction, of planetary type, said gears being rotatable in a retaining or driving block 91 This block may be held in place by the flange or shoulder. indicated at 10 at one end, and by a ring-like retaining member 11 which is shown as held in place in the -member A by a screw l12 which is shown as cooperating with a groove 13 in the member 11.- When used to expand a grinding tool', the concentric, shafts 3 and 5 may be connected with what might be called continuing shafts, incorporated with the expanded means-.of Y," the grinding tool (not shown) in any appropriate manner, as by connecting means comprising non-circular heads, as indicated at 14 and 15.

In the form shown, to impart rotation l thereto, indirectly from a ring gear disposed externally of member A, ythe block 9 'is pro- "ber A.

The member A is cut away to provide what might be called a transverse recess` designated 23, which receives gears functionally interposed between the described differential gearing and the ring gear above referred to. This recess also receives a pinion 24 which meshes with the gear 19 and which is held rotatably in position by a pin 25 that is inserted in the axial opening of the member 24 through a hole 26 provided in the member A and which pin has bearing in this hole and the small recess indicated at 27.. Pinion 24 is freely mounted onthe pin 25.

` 4 Toward completing an adjusting means,

for effecting differential relative rotation of shafts 3`and 5, according to the resistance of such rotation, the mentioned ring gear 28 may be connected for rotationwith a cylindrical member 30 by a key 31 so secured to an outer sleeve 32 as to form with these members what is, so far as concerns relative rotation, in effect a one-piece unit. The sleeve 32, when intended for manual engagement, has 'a knurled surface as shown in Fig. 2,

and when also intended for rotation by a brake or similar means (not shown) the member 30 may be provided exteriorly of the sleeve 32 with a braking surface 30 for cooperation with such brake. The key 31 y which is slidably received in complementary grooves in the member 30 may be secured against relative movement to the sleeve 32 by means of screws such as 33. The ring gear 28 isl provided on its inner periphery with gear teeth as shown at 34 which mesh with the pinions 24. The member 30 is shown as having a shoulder at 35-against which abuts a ring shaped retaining member 36; and this may be threaded on the shank B as indicated at 37. This ring member holds the member 30 and consequently the ring 28 against relative axial movement on the' shank B and further limits axial movement of sleeve, 32 and key 31 in their axial movement in one direction.

The outer sleeve 32 is shown as provided with suitably spaced openings indicated at 38 which are adapted to be engaged by a spanner wrench for imparting rotation to 'the assembly comprising the parts 28, 30 and 32. At one extremity the edge of the outer sleeve 32 is shown as cut away to provide a groove 39 in which are located ball bearings ymembers44, the extremities of which project into a circumferential groove 45 formed in the sleeve 32. This ball race construction at the extremity of the sleeve 32 provides a bearing member 41 whichis freely rotatable with respectto the sleeve 32 and which is mounted in such a manner that there is little or no appreciable friction between these parts.

The member A is provided with screw threads as shown at 46, land also a longitu- 1 dinal groove which is shown in Figure 1 at 47. A ring-like sleeve 48 is positioned around the member A and carries a screw pin l49 which fits in the groove 47 and is movable therein. Another ring-like member 50 which'is cut away on an inner edge as indicated at 51 to receive the member 48` is internally screw threaded and is mounted on the threaded portion 46 of the sleeve A.

The ring member 50 is shown as provided with an opening 52 which extends through the ring at the cut away portion and in this opening there is shown a pin 53, which may be held therein by means such as a spring wire ring 54 located in a groove 55 which extends circumferentially around the ring member 50.- The inner end of the pin 53 carries a bevelled dog member 56 which is designed to cooperate with a series of teeth 57 formed on the extremity' of thevring 48.

The ring 50 may be bevelled at one end as shown at 58 and this bevelled portion may be provided with appropriate indicia as shown in Figure 2. These indicia may cooperate with a suitable marking point on the member 48 to indicate the limit to which the expanding instrumentalities have been set.

The operation of the mechanism may be summed up somewhat briefly as follows A Spanner wrench is applied to an opening 38 to cause rotation of the assembly unit made up of the parts 28, 30 and 32. Rotation of the ring gear 28 and therefore the pinion 2'4 causes rotation of the gear 19 which through the connections at 16 and 17 rotate theblock 9 thereby operating the differential gear mechanisms made up of the gears 4, V6 and 8. It may be noted that the sleeve 32 is shown as rovided with screw threads 59 which are threaded on the threads 46 of the member 9. Rotation of this sleeve 32 is therefor-c accompanied by longitudinal movement of the sleeve with respect to the member A, .this relative motion being provided for by the key connection between the ring gear 28 and sleeve 29. The limiting or controlling mechanism comprising the rings 48 and` 50 may be of the member 48,-which is non-rotatably mounted on this member A. The movement of the sleeve 32 along the member A will be limited by the member 4,8 against which thel abutting member 4l bears to prevent further rotation of the sleeve 32. It is apparent that the pin and latch mechanism comprising the parts 53, 54, 56, and 57 will yieldably hold the ring member 50 in any position in which it is placed, but permit of its being adjusted manually.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is

1. vTransmission means suitable for use in applying power to an expansible tool and also to an expanding device therefor, said means comprising, in combination, a maifaw carrier member, planetary gearing mounted in the carrier member, a ring gear, motiontransmitting means, movable by said ring, which are positioned in the carrier member and connected with the planetary gearing, and means, movable by respective gears of said plentary gearing, differentially to cause eiective action of the expanding instrumentalities. Y Y

2. In honing mechanism of the class described, the combination with expanding instrumentalities of mechanism for differentially operating the expanding instrumentali-- ties, said mechanism comprising planetary gearing operatively connected to -said instrumentality and including a ring gear andintermediate gears rotatable to cause effective operation thereof, and means for limitingmovement of the ring gear.

3. In mechanism of the class described, the combination, with a main carrier member, of gearing for causing effective operation of instrumentalities located within the carrier member, said gearing. including aring member rotatable to transmit power through the gearing to the instrumentalities, a sleeve member operatively associated with said ring member and disposed on the carrier and movable longitudinally thereof incident to rotation of the ring member, .abutment means carried by the carrier member for limiting longitudinal movement of the sleeve mem-ber, and anti-friction means for reducing friction between the abutment member and the longitudinally movable member when the two engage.

4. Mechanism for operating expansible Y grinding tools, comprising, in combination,

'gear rotatable by said mea-ns and concentrically positioned within said carrier member,.- a plurality of shafts also concentrically carried Within the carrier member, andinternal means, movable by said gear, operable to cause differential Irelative rotation of said shafts.

5. Expanding mechanism for grinding tools, comprising, in combination, a carrier member, manually rotatable adjusting means including a ring gear on said carrier member, a sleeve member associated with said rotatable adjusting means, movable longitudinally 'with respect to the carrier member incident for obviating to as great an extent as feasible y the friction engendered by the engaging of these parts, and means forholding the ring members in an adjusted relationship.

7. Expanding mechanism for grinding tools, comprising, in combination, a carrier member, di'erential gear mechanism in the carrier member, planetary gearing for operating the gear mechanism, including a' ring gear manually operable, a sleeve screw threaded on the carrier member and longitudinally movable incident to rotation of the manually operable ring member, means for limiting movement of the sleeve along the carrier member consisting of a .ring member slidably but non-rotatably mounted on the car-l rier member, a second ring member overlapping the irst mentioned ring member, and a tooth and pin mechanism between said ring members for holding them in an adjusted relationship, said ring members carrying indicia for indicating their relative position on the carrier member.

8. In a mechanism of the general character described: a main body member provided at its respect-ive ends with connecting means, one of said ends comprising a hollow cylindrical portion; aplurality of shafts extending longitudinally within said hollow cylindrical portion; a planetary gearing organization' operatively connected with said shafts', and means, also carried by said body member, for so actuating said planetary gearing as differentially to rotate said shafts.

9. In a mechanism of the general character described: a main body member provided at its respective ends with connecting means, one of said ends comprising a hollow cylindrical portion; a plurality of shafts extending longitudinally within said hollow cylindrical portion; a planetary gearing organization operatively connected with said shafts and means, also carried by said body member, for so actuating said planetary gearing as differentially to rotate said shafts,-said actuating means including a ring gear which is disposed externally of said body member, a block in which gears of said planetary gearing are rotatably received, and means for transmitting rotation from said ring gear n to said block.

10. In a mechanism of the general character described: a main body member provided at its respective ends with connecting means, one of said ends comprising a hollow cylindrical portion; a plurality of shafts extending longitudinally within said hollow cylindrical portion; a planetary gearing organization operatively connected with said shafts; and means, also carried by said body member, for so actuating said planetary gearing as differentially to rotate said shafts,- said Shafts being concentrically disposed. i

vided at its respective ends with connecting means, one of said ends comprising a hollow cylindrical portion; a plurality of shafts eX- cylindrical portion; a planetary gearing orgapization operatively connected with said shafts; and means, also carried by said body member, for so actuating said planetary gearing as differentially to rotate said shafts,- said shafts outwardly terminating in separate connecting means.

12. In a mechanism of the general character described: a main body member provided at its respective ends with connecting means, cylindrical portion; a plurality of shafts ex- '.ending longitudinally within said hollow cylindrical portion; a planetary gearing organization operatively connected with said shafts; and means, also carried by said body member, for so actuating said planetary earin as dierentially to rotate said sha s, saldl planetary gearing organization being housed within said cylindrical portion.

13. In a mechanism of the general character described: a main body member provided atits respective ends with connecting means, one cylindrical portion; a plurality of shafts extending longitudinally within said hollow cylindrical portion; a planetary gearing organization operatively connected with said shafts; and means, also carried by said body member, for so actuating said planetary gearing as differentially to rotatesaid Shafts,-

said planetary gearing being so secured in said cylindrical portion as to be rotatable as an entirety therein.

.s 14. In a. mechanism of the general char- 11. In a mechanism of the general character described: a main body member pro-' tending longitudinally within said hollow A one of said ends comprising'a hollow of said ends comprising a hollow acter described: a main body member provided at its respective ends with connecting means, one of said ends comprising a hollow cylindrical portion; a plurality of shafts extending longitudinally within said hollow cylindrical portion; a plentary gearing organization operatively connected with said shafts and means, also carried by said body member, for so actuating 'said planetary gearing as diierentially to rotate said shafts,said actuating means including a ring gear provided with means for its rotation at will and with means for adjustably predetermining a limit of such rotation.

l5. In a device of the general character described: a hollow main body member provided With a motion-receiving end, and with a motion-imparting end; a plurality of concentric shafts ends; an adjustable element movably secured on said body; and gear means, functionally interposed between said adjustable element and said shafts and in a differential driving relationship to said shafts.

In testimony whereof I ailix luy-signature.

THOMAS F. QUIGLEY;

disposed within one of saidros 

